roughly, when arranged in increasing order, the uppermost 25% of a data set are greater than or equal to

Q3 - the upper quartile

Step-by-step explanation:

A set can be divided into 4 equal parts, i.e 4 quarters using quartiles

Q1 is the 25th percentile,

Q2 is the 50th percentile,

Q3 is the 75th percentile

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls